Surface Modification of NiW Alloy Substrates

作     者：Wang Xue1, 2, Li Chengshan2, Yu Zeming2, Zheng Huiling2, Ji Yongbin2, Chen Zewen 1, 2, Fan Zhanguo 1 1Northeastern University, Shenyang 110004, China 2Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, China 

作者机构：NW Inst Nonferrous Met Res Superconducting Mat Res Ctr Xian 710016 Peoples R China Northeastern Univ Shenyang 110004 Peoples R China 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2011年第40卷第S3期

页      面：380-382页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported by the Fundamental Research Funds for the Central Universities (N090602008) The National High Technology Research and Development Program of China (2009AA032401) Shaanxi Provincial Natural Science Foundation(2009JM6002) 

主　　题：NiW substrates sulfuration c (2×2) structure buffer layer 

摘      要：We have studied the adsorption of elemental S on the surfaces of NiW alloy substrates where elementary sulfur was used as sulfur source. Compared with those previous investigations which used H2S as the sulfur source and operated in an ultra-high vacuum chamber, we used elemental sulfur as the sulfur source which does not need an ultra-high vacuum chamber but Ar-H protection atmosphere in the process of sulfuration. After sulfuration, epitaxial LZO buffer layers were deposited on these substrates directly. The samples were investigated by means of AFM, XPS, SEM and XRD in this study. The results show that after sulfuration, S forms a c (2×2) structure at a coverage of 0.5 ML, in agreement with previous results, representing the effectiveness of elemental sulfur during the sulfuration process. The c (2×2)-S superstructure on the surface of the NiW substrates has optimized the La2Zr2O7(LZO) buffer layer texture.